Fortuna Silver Mines didn't strike it rich after an uninspiring quarterly report -- conveniently posted several hours after the market closed for the prior week -- led to a CIBC downgrade.

Swisher slipped after the sanitation services provider warned that it would be delaying its annual report. Restatements may be necessary. The company has plenty of potential, but its heady streak of acquisitions in a sector ripe for consolidation may be finally taking its toll.

Saba also has its bean counters working overtime. The provider of cloud-based training and Web conferencing solutions revealed that it will be delaying its third-quarter report after an internal accounting review.

Vipshop continues to be a heartbreaker of an IPO. The Chinese website operator offering flash sales on consumer goods went public less than two weeks ago at $6.50. It continues to lose ground.

InvenSense moved the wrong way after Oppenheimer downgraded shares of the motion-sensing chip maker, relinquishing its outperform rating.

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At the time this
article was published The Motley Fool owns shares of InvenSense. The Motley Fool has adisclosure policy. We Fools may not all hold the same opinions, but we all believe thatconsidering a diverse range of insightsmakes us better investors. Try any of our Foolish newsletter servicesfree for 30 days.Longtime Fool contributor Rick Munarriz calls them as he sees them. He does not own shares in any of the stocks in this story. Rick is also part of theRule Breakersnewsletter research team, seeking out tomorrow's ultimate growth stocks a day early.